Client-Error-Endpoint POST /api/vitec/client-error (0072-FE / 0077-BE)

Neue PSR-15-Middleware ClientErrorMiddleware: nimmt Browser-Fehler des
React-Frontends als JSON {url, message, stack, release, userAgent}
entgegen und antwortet 204 ohne Body. Schutz: 30 Meldungen pro Minute
und IP (Sliding Window ueber TYPO3-RateLimiter, 429 + Retry-After),
8-KB-Body-Limit (413, Content-Length und tatsaechliche Bytes), kein
JSON-Objekt oder leere message = 400, GET = 405. Keine Session, keine
Cookies; der /_json-Praefix funktioniert ebenfalls.

Speicherung in der neuen Tabelle tx_vitec_clienterrorlog mit
anonymisierter IP (IPv4 letztes Oktett 0, IPv6 /48). Sichtbar als
Tabelle "Client errors (last 24 h)" im Modul VITEC SSR (mit Stack als
Aufklapper) und als Zeile "Client errors reported (24 h / 7 d)" in der
Dashboard-Kachel VITEC: SSR statistics.

CLI vitec:client-error-cleanup [--days=30] loescht Eintraege aelter als
30 Tage (taeglich per Cron).

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

packages/vitec/Classes/Command/ClientErrorCleanupCommand.php

@@ -0,0 +1,53 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Evomedien\Vitec\Command;
+
+use Symfony\Component\Console\Attribute\AsCommand;
+use Symfony\Component\Console\Command\Command;
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Input\InputOption;
+use Symfony\Component\Console\Output\OutputInterface;
+use TYPO3\CMS\Core\Database\ConnectionPool;
+
+#[AsCommand(
+    name: 'vitec:client-error-cleanup',
+    description: 'Delete client error reports (tx_vitec_clienterrorlog) older than 30 days; run daily via cron',
+)]
+final class ClientErrorCleanupCommand extends Command
+{
+    private const TABLE = 'tx_vitec_clienterrorlog';
+    private const DEFAULT_DAYS = 30;
+
+    public function __construct(private readonly ConnectionPool $connectionPool)
+    {
+        parent::__construct();
+    }
+
+    protected function configure(): void
+    {
+        $this->addOption('days', 'd', InputOption::VALUE_REQUIRED, 'Keep entries younger than this many days', (string)self::DEFAULT_DAYS);
+    }
+
+    protected function execute(InputInterface $input, OutputInterface $output): int
+    {
+        $days = (int)$input->getOption('days');
+        if ($days < 1) {
+            $output->writeln('<error>--days must be at least 1</error>');
+            return Command::INVALID;
+        }
+        $cutoff = time() - $days * 86400;
+        $conn = $this->connectionPool->getConnectionForTable(self::TABLE);
+        $deleted = $conn->executeStatement('DELETE FROM ' . self::TABLE . ' WHERE crdate < ?', [$cutoff]);
+        $remaining = (int)$conn->executeQuery('SELECT COUNT(*) FROM ' . self::TABLE)->fetchOne();
+        $output->writeln(sprintf(
+            'deleted %d client error report(s) older than %d days (before %s), %d remaining',
+            $deleted,
+            $days,
+            date('Y-m-d H:i', $cutoff),
+            $remaining
+        ));
+        return Command::SUCCESS;
+    }
+}